<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>算数运算符</title>
        <script>
            var a=3;
            var b=4;
            document.write(a+b+"<br>");
            document.write(a-b+"<br>");
            document.write(a*b+"<br>");
            document.write(a/b+"<br>");
            document.write(a%b+"<br>");
            </script>

    </head>
    <body>
        
    </body>
</html>